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Hurst RD, Nieves A, Brichacek M. Expanding Glycomic Investigations through Thiol-Derivatized Glycans. Molecules 2023; 28:1956. [PMID: 36838944 PMCID: PMC9964202 DOI: 10.3390/molecules28041956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 02/16/2023] [Accepted: 02/16/2023] [Indexed: 02/22/2023] Open
Abstract
N-(2-thioethyl)-2-aminobenzamide (TEAB), a novel glycan auxiliary, was synthesized and its utility was evaluated. The auxiliary was conjugated to glycans by reductive amination with the water-stable reagent 2-picoline borane complex. Glycan products, which ranged from 1 to 7 linked hexoses, were all isolated in yields ranging from 60% to 90% after purification by reverse-phase chromatography. The novel conjugate introduces a convenient, shelf-stable thiol directly onto the desired free glycans with purification advantages and direct modification with efficient reactions through alkenes, halides, epoxides, disulfides, and carboxylates in yields of 49% to 93%. Subsequently, a thiol-selective modification of the BSA protein was used to generate a neoglycoprotein with a bifunctional PEG-maleimide linker. To further illustrate the utility of a thiol motif, 2-thiopyridine activation of a thiol-containing support facilitated the covalent chromatographic purification of labeled glycans in yields up to 63%. Finally, initial proof of concept of implementation in a light printed microarray was explored and validated through FITC-labeled concanavalin A binding. In conclusion, the thiol-functionalized glycans produced greatly expand the diversity of bioconjugation tools that can be developed with glycans and enable a variety of biological investigations.
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Affiliation(s)
- Robert D Hurst
- Department of Chemistry, University of Maine, Orono, ME 04469, USA
| | - Angel Nieves
- Department of Chemistry, University of Maine, Orono, ME 04469, USA
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2
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Domin S, Plata P, Zambroń BK. Diastereoselectivity Switch in the Pd(0)/InI-Mediated Reactions of β-Lactams with Aldehydes: An Entry into Nonracemic Semiprotected (3 E)-2,6-Enediols. J Org Chem 2019; 84:12268-12280. [PMID: 31490071 DOI: 10.1021/acs.joc.9b01471] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The switch from N-methylimidazole (N-MI) to the Et3N N-ligand efficiently alters diastereoselectivity in Pd(0)/InI-mediated allylations of aldehydes with β-lactam-derived organoindiums. As a result, (3E)-selective allylations and crotylations of a variety of aliphatic and (hetero)aromatic aldehydes with differently substituted chiral ε-amido-allylindiums were developed. Depending on the relative β-lactam configuration, the reactions occur under kinetic or thermodynamic control, with effective remote 1,5- or 1,4,5-asymmetric induction to afford a diversity of previously unavailable (3E)-2,5-syn-2,6-anti-, (3E)-2,5-anti-2,6-anti-, and (3E)-2,5-anti-2,6-syn-substituted enediols, amino alcohols, and homoallylic alcohols in modest to high yields and with moderate to excellent diastereoselectivity. The effect of the N-ligand as well as β-lactam and aldehyde structures on the yield and stereoselectivity was investigated.
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Affiliation(s)
- Sylwia Domin
- Institute of Organic Chemistry , Polish Academy of Sciences , Kasprzaka 44/52 , 01-224 Warsaw , Poland
| | - Paulina Plata
- Institute of Organic Chemistry , Polish Academy of Sciences , Kasprzaka 44/52 , 01-224 Warsaw , Poland
| | - Bartosz K Zambroń
- Institute of Organic Chemistry , Polish Academy of Sciences , Kasprzaka 44/52 , 01-224 Warsaw , Poland
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3
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Domin S, Kędzierski J, Zambroń BK. Remote 1,5-Stereoselectivity Control by an N-Ligand Switch in the Pd(0)/InI-Promoted Reactions of 4-Ethynyl-β-lactams with Aldehydes. Org Lett 2019; 21:3904-3908. [PMID: 31094523 DOI: 10.1021/acs.orglett.9b00891] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Configurationally stable ε-amido-propargylindiums, generated in situ from N-Ts-4-ethynylazetidin-2-ones in the presence of InI, catalytic amounts of Pd(PPh3)4, and N-methylimidazole or pyridine ligand react with unusual regioselectivity with aromatic and aliphatic aldehydes to afford 2,6- syn- or 2,6- anti-allenediols with excellent central-to-axial chirality transfer and useful levels of acyclic remote 1,5-stereocontrol.
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Affiliation(s)
- Sylwia Domin
- Institute of Organic Chemistry , Polish Academy of Sciences , Kasprzaka 44/52 , 01-224 Warsaw , Poland
| | - Jacek Kędzierski
- Institute of Organic Chemistry , Polish Academy of Sciences , Kasprzaka 44/52 , 01-224 Warsaw , Poland
| | - Bartosz K Zambroń
- Institute of Organic Chemistry , Polish Academy of Sciences , Kasprzaka 44/52 , 01-224 Warsaw , Poland
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4
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Plata P, Klimczak U, Zambroń BK. Acyclic Remote 1,5- and 1,4,5-Stereocontrol in the Catalytic Stereoselective Reactions of β-Lactams with Aldehydes: The Effect of the N-Methylimidazole Ligand. J Org Chem 2018; 83:14527-14552. [PMID: 30412405 DOI: 10.1021/acs.joc.8b02333] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The application of the N-methylimidazole ( N-MI) ligand in the Pd(0)/InI-promoted allylations of aldehydes with β-lactam-derived organoindiums enables the reaction of azetidin-2-ones with diversely substituted allyl moieties, inert under previously reported conditions. As a result, allylations and crotylations of a variety of aromatic and aliphatic aldehydes with previously unavailable chiral ε-amido-allylindiums bearing α-, β-, or γ-substituted allyl fragments were developed. The reactions occur under thermodynamic control with a highly efficient remote 1,5- or 1,4,5-stereocontrol to afford a diversity of (3 Z)-2,5- anti-2,6- syn- or (3 Z)-2,5- syn-2,6- anti-substituted enediols, aminoalcohols, and homoallylic alcohols in moderate to high yields and with an excellent diastereoselectivity. A detailed study on the effect of the β-lactam and aldehyde structures and chirality on the yield and stereochemistry in the products was carried out.
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Affiliation(s)
- Paulina Plata
- Institute of Organic Chemistry , Polish Academy of Sciences , Kasprzaka 44/52 , Warsaw 01-224 , Poland
| | - Urszula Klimczak
- Institute of Organic Chemistry , Polish Academy of Sciences , Kasprzaka 44/52 , Warsaw 01-224 , Poland
| | - Bartosz K Zambroń
- Institute of Organic Chemistry , Polish Academy of Sciences , Kasprzaka 44/52 , Warsaw 01-224 , Poland
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5
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Uraoka S, Shinohara I, Shimizu H, Noguchi K, Yoshimura A, Zhdankin VV, Saito A. Hetero Diels-Alder Reaction and Ene Reaction of Acylnitroso Species in situ Generated by Hypoiodite Catalysis. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801340] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Saki Uraoka
- Division of Applied Chemistry; Institute of Engineering; Tokyo University of Agriculture and Technology; 2-24-16 Naka-cho, Koganei 184-8588 Tokyo Japan
| | - Ikumi Shinohara
- Division of Applied Chemistry; Institute of Engineering; Tokyo University of Agriculture and Technology; 2-24-16 Naka-cho, Koganei 184-8588 Tokyo Japan
| | - Hisato Shimizu
- Division of Applied Chemistry; Institute of Engineering; Tokyo University of Agriculture and Technology; 2-24-16 Naka-cho, Koganei 184-8588 Tokyo Japan
| | - Keiichi Noguchi
- Instrumentation Analysis Center; Institute of Engineering; Tokyo University of Agriculture and Technology; Tokyo Japan
| | - Akira Yoshimura
- Department of Chemistry and Biochemistry; Institute of Engineering; University of Minnesota Duluth; 55812 Duluth MN USA
- Institute of Engineering; The Tomsk Polytechnic University; 634050 Tomsk Russia
| | - Viktor V. Zhdankin
- Department of Chemistry and Biochemistry; Institute of Engineering; University of Minnesota Duluth; 55812 Duluth MN USA
- Institute of Engineering; The Tomsk Polytechnic University; 634050 Tomsk Russia
| | - Akio Saito
- Division of Applied Chemistry; Institute of Engineering; Tokyo University of Agriculture and Technology; 2-24-16 Naka-cho, Koganei 184-8588 Tokyo Japan
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6
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Klimczak UK, Zambroń BK. Effective 1,5-stereocontrol in Pd(0)/InI promoted reactions of chiral N-Ts-4-vinylazetidin-2-ones with aldehydes. An efficient entry into nonracemic semi-protected (3Z)-2,6-anti-enediols. Chem Commun (Camb) 2015; 51:6796-9. [DOI: 10.1039/c5cc01485a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
ε-Amido-allylindiums generated from N-Ts-4-vinylazetidin-2-ones react with aldehydes with effective remote 1,5-stereocontrol to afford (3Z)-2,6-anti-enediols in good yield and with excellent diastereoselectivity.
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Affiliation(s)
| | - Bartosz K. Zambroń
- Institute of Organic Chemistry
- Polish Academy of Sciences
- 01-224 Warsaw
- Poland
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7
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Veits GK, Wenz DR, Palmer LI, St. Amant AH, Hein JE, Read de Alaniz J. Cascade rearrangement of furylcarbinols with hydroxylamines: practical access to densely functionalized cyclopentane derivatives. Org Biomol Chem 2015; 13:8465-9. [DOI: 10.1039/c5ob00944h] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The aza-Piancatelli rearrangement with hydroxylamines to 4-aminocyclopentenones is described. Subsequent transformations highlight the versatility of the cyclopentene scaffold and the value of the hydroxylamine in this transformation.
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Affiliation(s)
- Gesine K. Veits
- Department of Chemistry and Biochemistry
- University of California
- Santa Barbara
- USA
| | - Donald R. Wenz
- Department of Chemistry and Biochemistry
- University of California
- Santa Barbara
- USA
| | - Leoni I. Palmer
- Department of Chemistry and Biochemistry
- University of California
- Santa Barbara
- USA
| | - André H. St. Amant
- Department of Chemistry and Biochemistry
- University of California
- Santa Barbara
- USA
| | - Jason E. Hein
- Chemistry and Chemical Biology
- University of California
- Merced
- USA
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8
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Trost BM, Osipov M, Kaib PSJ, Sorum MT. Acetoxy Meldrum's acid: a versatile acyl anion equivalent in the Pd-catalyzed asymmetric allylic alkylation. Org Lett 2011; 13:3222-5. [PMID: 21615099 PMCID: PMC3144701 DOI: 10.1021/ol2011242] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Acetoxy Meldrum's acid can serve as a versatile acyl anion equivalent in the Pd-catalyzed asymmetric allylic alkylation. The reaction of this nucleophile with various meso and racemic electrophiles afforded alkylated products in high yields and enantiopurities. These enantioenriched products are versatile intermediates that can be further functionalized using nitrogen- and oxygen-centered nucleophiles, affording versatile scaffolds for the synthesis of nucleoside analogues. These scaffolds were used to complete formal syntheses of the anti-HIV drugs carbovir, abacavir, and the antibiotic aristeromycin.
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Affiliation(s)
- Barry M Trost
- Department of Chemistry, Stanford University, Stanford, California 94305-5080, USA.
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9
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Bodnar BS, Miller MJ. The nitrosocarbonyl hetero-Diels-Alder reaction as a useful tool for organic syntheses. Angew Chem Int Ed Engl 2011; 50:5630-47. [PMID: 21520360 DOI: 10.1002/anie.201005764] [Citation(s) in RCA: 206] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2010] [Indexed: 11/11/2022]
Abstract
Organic transformations that result in the formation of multiple covalent bonds within the same reaction are some of the most powerful tools in synthetic organic chemistry. Nitrosocarbonyl hetero-Diels-Alder (HDA) reactions allow for the simultaneous stereospecific introduction of carbon-nitrogen and carbon-oxygen bonds in one synthetic step, and provide direct access to 3,6-dihydro-1,2-oxazines. This Review describes the development of the nitrosocarbonyl HDA reaction and the utility of the resulting oxazine ring in the synthesis of a variety of important, biologically active molecules.
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Affiliation(s)
- Brian S Bodnar
- Chemspeed Technologies, Inc. 113 North Center Drive, North Brunswick, NJ 08906, USA
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10
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Bodnar BS, Miller MJ. Hetero-Diels-Alder-Reaktionen von Nitrosocarbonylverbindungen als nützliches Verfahren in der organischen Synthese. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201005764] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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11
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Granchi C, Roy S, Giacomelli C, Macchia M, Tuccinardi T, Martinelli A, Lanza M, Betti L, Giannaccini G, Lucacchini A, Funel N, León LG, Giovannetti E, Peters GJ, Palchaudhuri R, Calvaresi EC, Hergenrother PJ, Minutolo F. Discovery of N-hydroxyindole-based inhibitors of human lactate dehydrogenase isoform A (LDH-A) as starvation agents against cancer cells. J Med Chem 2011; 54:1599-612. [PMID: 21332213 DOI: 10.1021/jm101007q] [Citation(s) in RCA: 167] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Highly invasive tumor cells are characterized by a metabolic switch, known as the Warburg effect, from "normal" oxidative phosphorylation to increased glycolysis even under sufficiently oxygenated conditions. This dependence on glycolysis also confers a growth advantage to cells present in hypoxic regions of the tumor. One of the key enzymes involved in glycolysis, the muscle isoform of lactate dehydrogenase (LDH-A), is overexpressed by metastatic cancer cells and is linked to the vitality of tumors in hypoxia. This enzyme may be considered as a potential target for new anticancer agents, since its inhibition cuts cancer energetic and anabolic supply, thus reducing the metastatic and invasive potential of cancer cells. We have discovered new and efficient N-hydroxyindole-based inhibitors of LDH-A, which are isoform-selective (over LDH-B) and competitive with both the substrate (pyruvate) and the cofactor (NADH). The antiproliferative activity of these compounds was confirmed on a series of cancer cell lines, and they proved to be particularly effective under hypoxic conditions. Moreover, NMR experiments showed that these compounds are able to reduce the glucose-to-lactate conversion inside the cell.
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Affiliation(s)
- Carlotta Granchi
- Dipartimento di Scienze Farmaceutiche, Università di Pisa, Via Bonanno 6, 56126 Pisa, Italy
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12
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13
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Granchi C, Roy S, Del Fiandra C, Tuccinardi T, Lanza M, Betti L, Giannaccini G, Lucacchini A, Martinelli A, Macchia M, Minutolo F. Triazole-substituted N-hydroxyindol-2-carboxylates as inhibitors of isoform 5 of human lactate dehydrogenase (hLDH5). MEDCHEMCOMM 2011. [DOI: 10.1039/c1md00071c] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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14
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Ji C, Miller MJ. Cyclopropanation of nitroso Diels-Alder cycloadducts and application to the synthesis of a 2',3'-methano carbocyclic nucleoside. Tetrahedron Lett 2010; 51:3789-3791. [PMID: 20607121 PMCID: PMC2894734 DOI: 10.1016/j.tetlet.2010.05.062] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Treatment of nitroso Diels-Alder cycloadducts 1 with diazomethane in the presence of palladium acetate gives synthetically useful exo-6-oxa-7-azatricyclo[3.2.1.02,4]octane derivatives 7 in good to excellent yield. Using this methodology, a conformationally restricted 2',3'-methano carbocyclic nucleoside was efficiently synthesized from nitroso cycloadduct 1a in 7 steps.
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Affiliation(s)
- Cheng Ji
- Department of Chemistry and Biochemistry, 251 Nieuwland Science Hall, University of Notre Dame, Notre Dame, Indiana, 46556, United States
| | - Marvin J. Miller
- Department of Chemistry and Biochemistry, 251 Nieuwland Science Hall, University of Notre Dame, Notre Dame, Indiana, 46556, United States
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15
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Palladium(0)/indium iodide-mediated allylations of electrophiles generated from the hydrolysis of Eschenmoser's salt: One-pot preparation of diverse carbocyclic scaffolds. Tetrahedron Lett 2010; 51:3050-3052. [PMID: 20526464 DOI: 10.1016/j.tetlet.2010.04.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A formyl equivalent was generated in situ from Eschenmoser's salt in aqueous THF and was reacted with an allylindium species. Acylnitroso-derived hetero-Diels Alder adducts and related allyl acetates were shown to be substrates for Pd(0)/InI-mediated allylations of formaldehyde-related species to provide homoallylic alcohols. Hydroxymethyl groups were installed with regio- and diastereocontrol to provide relevant disubstituted carbocyclic scaffolds. Enantiopure anti-disubstituted cyclopentene products were prepared from a chiral allyl acetate.
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16
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Crotti S, Bertolini F, Macchia F, Pineschi M. Copper-promoted rearrangement of 1,3-cyclohexadiene-acylnitroso cycloadducts. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.02.114] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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17
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Crotti S, Bertolini F, Bussolo VD, Pineschi M. Regioselective Copper-Catalyzed Alkylation of [2.2.2]-Acylnitroso Cycloadducts: Remarkable Effect of the Halide of Grignard Reagents. Org Lett 2010; 12:1828-30. [DOI: 10.1021/ol100454c] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Stefano Crotti
- Dipartimento di Scienze Farmaceutiche, Sede di Chimica Bioorganica e Biofarmacia, Università di Pisa, Via Bonanno 33, 56126 Pisa, Italy
| | - Ferruccio Bertolini
- Dipartimento di Scienze Farmaceutiche, Sede di Chimica Bioorganica e Biofarmacia, Università di Pisa, Via Bonanno 33, 56126 Pisa, Italy
| | - Valeria di Bussolo
- Dipartimento di Scienze Farmaceutiche, Sede di Chimica Bioorganica e Biofarmacia, Università di Pisa, Via Bonanno 33, 56126 Pisa, Italy
| | - Mauro Pineschi
- Dipartimento di Scienze Farmaceutiche, Sede di Chimica Bioorganica e Biofarmacia, Università di Pisa, Via Bonanno 33, 56126 Pisa, Italy
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18
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Yang B, Miller MJ. Indium triflate-assisted nucleophilic aromatic substitution reactions of nitrosobezene-derived cycloadducts with alcohols. Org Lett 2010; 12:392-5. [PMID: 20000806 DOI: 10.1021/ol9027607] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Exclusive nucleophilic aromatic substitution of hydrogen in conjunction with cleavage of the N-O bond was observed when nitrosobenzene-derived nitroso cycloadducts were treated with indium triflate in the presence of alcohols. Aromatic alkoxylated syn-1,4 aminocycloalkenol products with good to excellent regioselectivity (16:84 to 0:100, ortho:para) were obtained.
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Affiliation(s)
- Baiyuan Yang
- Department of Chemistry and Biochemistry, 251 Nieuwland Science Hall, University of Notre Dame, Notre Dame, Indiana 46556, USA
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19
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Cooper BFT, Macdonald CLB. Alternative syntheses of univalent indium salts including a direct route from indium metal. NEW J CHEM 2010. [DOI: 10.1039/c0nj00036a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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20
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Yang B, Miller MJ. Regio- and stereoselective indium triflate-mediated nucleophilic ring-opening reactions of 3-aza-2-oxabicyclo[2.2.1]hept-5-ene and -[2.2.2]oct-5-ene systems. J Org Chem 2009; 74:7990-3. [PMID: 19754105 DOI: 10.1021/jo9016343] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Indium triflate-mediated nucleophilic ring-opening reactions of 3-aza-2-oxabicyclo[2.2.1]hept-5-ene and -[2.2.2]oct-5-ene systems with alcohols and water were investigated. Reactions of [2.2.1] bicyclic systems gave anti-1,2-, anti-1,4- and syn-1,4-ring-opened products with moderate to excellent regio- and stereoselectivity. When [2.2.2] bicyclic systems were subjected to similar reaction conditions, only anti-1,2 and anti-1,4-ring-opened products were obtained.
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Affiliation(s)
- Baiyuan Yang
- Department of Chemistry and Biochemistry, University of Notre Dame, 251 Nieuwland Hall, Notre Dame, Indiana 46556, USA
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21
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Cesario C, Miller MJ. Syntheses of carbocyclic uracil polyoxin C analogs: application of Pd(0)/InI-allylation of 4-acetoxy-2-azetidinone. J Org Chem 2009; 74:5730-3. [PMID: 19514728 PMCID: PMC2745051 DOI: 10.1021/jo900861x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Carbocyclic uracil polyoxin C analogs are prepared from an acylnitroso-derived hetero Diels-Alder cycloadduct in fewer than nine steps. Pd(0)/InI-mediated allylation of 4-acetoxy-2-azetidinone is used to install the beta-amino acid side chain at the C-5' position of the carbocycle.
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Affiliation(s)
- Cara Cesario
- Department of Chemistry and Biochemistry, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, Indiana 46556
| | - Marvin J. Miller
- Department of Chemistry and Biochemistry, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, Indiana 46556
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